In the system of S.I.( C. And. ) seven base units, two additional, the rest are all derivatives .
System C. I. ( was adopted at the international Congress of scientists - physicists in 1961 G.)
1. A unit of length ( l m - meter )
2. A unit of mass ( m kg )
3. Time unit ( t )
4. The unit of temperature ( T K - Calvin )
5. Unit of amount of substance (___ mol )
6. The unit of current ( I A - amps )
7. Unit of amount of light ( I CD. ; St.) Candela. candle
Additional values
1. The unit of angle measurement (_α happy.) radian
2. The unit of measure of solid angle (__Ω_ p.) steradian